Youngtown is a town in Maricopa County, Arizona, United States. According to the 2010 census, the population of the town is 6,156.[1] Youngtown is the oldest retirement community in the US. In 1954, two developers bought of farmland & built is notable as the first master-planned, adult community in the United States, dedicated exclusively to retirees, designed by Ben Schleifer. However, in 1996, the town denied extending the stay of a 16 year old child to live in the community. In response, the Arizona Attorney General investigated and determined it was unenforceable. In response Youngtown repealed the age restrictions in 1999.